402102013 has 4 divisors (see below), whose sum is σ = 402145408. Its totient is φ = 402058620.

The previous prime is 402101989. The next prime is 402102053. The reversal of 402102013 is 310201204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 402102013 - 2²¹ = 400004861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402101984 and 402102002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402102053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1581 + ... + 28402.

It is an arithmetic number, because the mean of its divisors is an integer number (100536352).

Almost surely, 2^402102013 is an apocalyptic number.

It is an amenable number.

402102013 is a deficient number, since it is larger than the sum of its proper divisors (43395).

402102013 is a wasteful number, since it uses less digits than its factorization.

402102013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43394.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 402102013 is about 20052.4814673895. The cubic root of 402102013 is about 738.0946925251.

Adding to 402102013 its reverse (310201204), we get a palindrome (712303217).

The spelling of 402102013 in words is "four hundred two million, one hundred two thousand, thirteen".